2778776253 has 48 divisors (see below), whose sum is σ = 4621505280. Its totient is φ = 1648183680.

The previous prime is 2778776251. The next prime is 2778776261. The reversal of 2778776253 is 3526778772.

It is a happy number.

2778776253 is a `hidden beast` number, since 2 + 7 + 7 + 8 + 7 + 7 + 625 + 3 = 666.

It is not a de Polignac number, because 2778776253 - 2¹ = 2778776251 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2778776253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2778776251) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 144501 + ... + 162597.

It is an arithmetic number, because the mean of its divisors is an integer number (96281360).

Almost surely, 2^2778776253 is an apocalyptic number.

It is an amenable number.

2778776253 is a deficient number, since it is larger than the sum of its proper divisors (1842729027).

2778776253 is a wasteful number, since it uses less digits than its factorization.

2778776253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18175 (or 18158 counting only the distinct ones).

The product of its digits is 6914880, while the sum is 54.

The square root of 2778776253 is about 52714.0991860811. The cubic root of 2778776253 is about 1405.8895179832.

The spelling of 2778776253 in words is "two billion, seven hundred seventy-eight million, seven hundred seventy-six thousand, two hundred fifty-three".